Final answer:
An appurtenance is a legal term referring to a right or privilege associated with property ownership, including structures and rights that are considered part of the property.
Step-by-step explanation:
The best definition for an appurtenance is a right or privilege associated with owning property. This term encompasses various legal rights or improvements attached to the land, which may include structures, rights of way, easements, and other features that are considered to be part of the property once attached. Appurtenances are significant in the context of property rights because they are integral to the utilization and value of the property.